Method of securing diamonds in saw-teeth



(No Model.)

A. H. LUCAS.

METHOD OF SECURING DIAMONDS IN SAW TEETH. No, 324,945. Patented Aug. 25, 1885.

Fay Z.

Wfmx m: \WWMVLM. flit i 5 MW UNITED STATES PATENT Cl nics.

AUSTIN H. LUCAS, OF ALLEGHENY, PENNSYLVANIA.

METHOD OF SECURING DIAMONDS IN SAW-TEETH.

SPECIFICATION forming part of Letters Patent No. 324,945, dated August 25, 1885.

Application filed May :26, 1884. (N0 model.)

To (tZZ whom, it may concern.-

Be it known that I, AUs'rIN H. LUCAS, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Methods of Securing Diamonds in Saw-Teeth, and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention has for its object the construction of a cavity in detachable saw-teeth for stone-saws, the contour of which'will exactly conform to the form of the diamond or carbon point; and my invention consists in making a plaster cast around the diamond or carbon, then removing the diamond or carbon and casting in said plaster mold a copper form corresponding exactly to that of the diamond or carbon, and then casting around said copper or other metallic form the detachable tooth, which is subsequently divided in a line with the longitudinal axis of said copper or other metallic form, which formis removed, leaving a cavity of the exact form of the diamond or carbon to be inserted therein. The tooth is then placed in the saw-blade by any of the known means. i

To enable others skilled in the art to make and use my invention, I will proceed to de scribe its construction and operation.

In the accom ianying drawings, Figure 1 represents an ordinary diamond or carbon such as is used in stonesaws. Fig. 2 represents a vertical section ot'plastcr cast,divided on a line with the longitudinal axis of the diamond or carbon. Fig. 3 represents longitudinal sections of the detachable tooth, having a cavity for the reception of the diamond or carbon. Fig. 41. represents the tooth secured in the saw-blade.

The diamond or carbon is suitably set in a frame for the purpose of pouring around it plaster, the plaster being cast entirely around the diamond, which plaster having become sui'liciently set is divided on a line with the longitudinal axis of the diamond or carbon. The diamond is then removed and the mold dried, aller which molten copper or other suitable metal is poured into the cavity A of said mold, thereby forming a form of copper or other metal corresponding exactly to the form of the diamond or carbon. This copper form is then placed in a suitable mold, and a metal tooth is cast partly around said form, which cast tooth is afterward divided on a line with the longitudinal axis of said copper form, which form is then removed, leaving a cavity, B, in the two sections of the exact form of the diamond or carbon, which diamond or carbon is then placed in said cavity B and the two sections secured in the sawblade, as shown in Fig. 4C, in which 0 repre sents a section of the saw-blade, and D E the sections of the detachable tooth, and F the diamond or carbon. The detachable tooth is represented in the present case as being secured in the saw-bladc by means of a key; but I wish it distinctly understood that I do not confine myself to any particular manner of securing the tooth in the saw-blade or to the form of the tooth, but leave that to the skill and judgment of the mechanic.

By forming the receptacle as hereinbefore described for the reception of the diamond or carbon, it will be readily observed that said receptacle willalways correspond in form to that of the diamond to be used, and it will be held firmly without undue strain upon it.

\Vhat I claim is- The method herein described of setting diamonds in saw-teeth, the same consisting in placing the diamond in a suitable frame, pouring plaster around it, and when set dividing the plaster on a line with axis of the carbon, then removing the diamond and casting molten copper in the cavity, then removing the copper from and casting a metal tooth partly around said form, then dividing the tooth longitudinally and placing the tooth in the cavity, the parts being held together when in place, thus securing the diamond, substantially as specified.

AUSTIN H. LUCAS.

Vitnesses:

A. C. JonNs'roN, (J. S. J onNs'roN. 

